Thesaurus.com
Dictionary.com
Definitions

harmful

[hahrm-fuhl] / ˈhɑrm fəl /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Harmful extracellular vesicles were found in patients with kidney disease but not in healthy volunteers.

From Science Daily • Jan. 20, 2026

Harmful environments or substances can worsen your response to an exposure.

From The Wall Street Journal • Jan. 19, 2026

Harmful algae blooms had sickened marine life in each of the three years prior.

From Los Angeles Times • Sep. 17, 2025

National Office for Harmful Algal Blooms estimated that the United States spends upwards of $50 million annually in costs related to health, fisheries, recreation, tourism and monitoring.

From Salon • Aug. 16, 2025

Harmful bacteria may have gotten well established on the premises and the entrance of a few is enough to seriously affect the flavor of the milk.

From One Thousand Questions in California Agriculture Answered by Wickson, Edward J. (Edward James)




Vocabulary lists containing harmful


Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "harmful" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com